Process of producing wound strips or tape of varnished fabric.



0. DALE.

PROCESS OF PRODUCING WOUNP STRIPS 0R TAPE 0F VARNISHED FABRIC.

APPLICATION FILED AUG.8, 1911.

1,274, 144. Patented July 30, 1918.

given/01 oswowpm TE STATES PATENT oFFIcE.

OSWALD DALE, OF IRVINGTON, NEWJER-SEYL I rnocnss or rnonncmo WOUND s'rnrrs 0R TAPE or vARmsHnn FABBIQ, I

To all whom it may concern Be it known that I, OswAIln DALE, a citi zen of the United States, residing at Irving'- ton, in the county of Essex and State of New Jersey, have invented certain new and useful Improvements in Processes of Producing Wound Strips or Tape of Varnished Fabric; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to the process of producing wound rolls of insulating tape or the like.

In the manufacture of insulation of this character, the practice is to first immerse a long web of fibrous material, such as fabric, in a solution of suitable insulating substance, as varnish, which is subsequently oxidized and becomes a veritable component part of the fabric. The web may be treated with one or more coatings of the insulating substance, accordin to the particular requirements. A bolt of fabric so prepared is placed on. a cutting and windin machine in order that the web may be cut into a plurality of strips and these strips then wound into individual rolls of a size suitable for delivery to the trade. The cutting and winding machine usually employed for this purpose has a part thereof, a tensioning device which is designed to maintain all of the strips taut as they are cut from the bolt of webbing, so that the individual rolls of the strips will when the windingoperation is completed, be in compact form and devoid of any tendency to come unwound. It has been found, however, that the tensioning device to which reference has just been made will not impose a uniform tension on all of the individual strips at the same time because of thevariance in the tensile strength of the fabric. Consequently, while some of the rolls will be wound compactly, others will be wound loosely, and since it is essential that all of the rolls should be wound compactly and tightly, the loose rolls, when removed from the machine, have to be rewound entirely by hand. This manual rewinding of'the tape requires a great deal of time and is, therefore, -a considerable item of expense in a plant where a large number of such machines are used.

I overcome this inherent disadvantage by the application of heat to the coated web- I Specification of Letters Patent.

Patented July i'ais'.

7 Application filed August 8, 1917i Serial No. 185,167.

bing at some convenient point in its length. Heat softens the insulating substance and renders it tacky, whereby the layers ofthe strips are caused to adhere to each other and form compact rolls. This advantageous result obtains despite any slight variation in the operation of the tensioning device.

ne Way in which my invention may be carried out is shown in the accompanying drawings,

claims. V

In said drawings,

Figure 1 is a side elevation of a cutting and winding machine embodying my attachment Fig. 2 is a front' elevation of the machine,

hereinafter described and embraced w1th1n the scope of theappended,

partly broken away to more clearly show the position of the'cuttingdisk, and

Fig. 3 is a detail sectional view of the heating unit.

Referring more particularly to the draw.- ings, for a detailed description of'my invention, numeral 1 designates generally a bed comprising two side members or frames 2 which may be spaced any suitable distance. Bearings, as 3, the tension of which is regulable, are provided at the rear of the bed for receiving a shaft 4, around which is wound'a bolt offabric 5. The web. 6 of which this bolt is formed, and whichit will be understood has been previously treated with a coating bath, is'fed over the idler 7 and between shafts 8 and 9 carrying opposed cutting disks 8 and 9 by means of which it is cut into strips 10, of any desired width.

A certain number of these strips then pass forwardly under a heating roller 11 while the remaining strips pass under the heating roller 12, and these different sets of strips are wound upon the rollers 13 and 14 re spectively. If desired, an'idler as 15, may be interposed between the cutting disk and the upper roller 13. Furthermore, tubes. of cardboard or other suitable material, as 16, may be detaehably mounted on the rollers 13 and 14 to serve as cores for the'several rolls.

The heating roller may be of any approvedtype. In Fig.3 of the drawings, I have shown an electrical heating element 17 although I wish it understood that I may employ any equivalent form of heating device.

The heating of the coated fabric, in addition to rendering the coating tacky for the purpose of causing successive layers of the fabric to adhere to each other, makes the fabric extremely pliable so that each of the successive layers of the roll will conform to 5 each other to a nicety. What is claimed is: The herein described process, which consists in unwinding from one roll a Web of fibrous material having a coating adapted to be softened by heat, cutting said Web into 10 strips, winding said strips on to a roll, and in heating the material between the rolls to soften the coating and thus cause the successive layers of the second roll to slightly adhere to each other, but permit of their 15 ready detachability.

In testimony whereof I affix my signature.

OSWALD DALE.

Copies of this patent may be obtained for five cents each, by addressing the commissioner of Patents, Washington, D. G. 

